Stellings extension box questions
 

I have Stellings boxes like the pic on my new to me boat. Are the drive shafts bolted directly to the flywheel or is there another splined shaft in the assembly? Hopefully that makes sense. Will be yanking the engines soon and want to get it ready.
https://cimg8.ibsrv.net/gimg/www.off...3c470b279c.jpg

Mine bolts directly to flywheel.

Peaking inside mine look like they do as well. Just wasn't sure what the entire assembly looked like. Thanks!

In your picture, there is a gold "hub". In my application, the hub is bolted to the flywheel and the u-joint 4 bolts bolt directly to it. So, yes, its direct to the flywheel. Metal to Metal. The key to these boxes is to get the carrier aligned with the driveshaft and keep it good and tight. Once its dialed in they last many years. There is a company that makes that gold coupler out of a polymer called Globe Products - but I never got around to installing one.

In the jet boat world they call that a crank "button", bolts thru the flywheel then the flange for driveshaft bolts to it. Once in a while , you'll see where someone leaves carrier bearing out and uses a long shaft from imco and a coupler, I think "KAAMA" MARK SPERLNGS AT was like that

my boats been w/ the long shaft for over 15yrs.even made some money back selling the carrier bearings to a couple of guys that needed them badly.

My engines are moved forward and I have a longer driveshaft on mine, but it is still basically the same setup and bolts directly to the flywheel.
800ish hours that way. I grease the bearings, splines and U joints every Spring.

Thanks for the replies. Seemed simple enough looking at it but I wanted to make 100% sure so I was ready when I pull the engines.

I'm sure I will have more questions in the future, as I would like to put offshore front mounts in over the winter as well.

Great info, as I'm the proud owner of (2) Stelling boxes now! What is the purpose of these plugs on the bottom, I pulled the forward 1 and it's not a drain?
https://cimg9.ibsrv.net/gimg/www.off...1d174051ad.jpg

my stelling boxes for bravos don't have any plugs.some one must have added them for their application.

I don't have those plugs either. The longer one looks like some type of drain.
I've never had any water in my Stelling boxes, but have heard of water getting into other peeps Imco boxes.

Any chance someone tried to plumb a way to grease the carrier with the first bolt holding down a component to the box?

No idea for certain - just throwing it out there...

Thanks for the replies guys, I'm going to investigate it further this weekend.
Dean

I had water get in there once,,got aggressive washing the bilge.:D

Getting ready to get mine on, how do I do the alignment?

There’s shims that go between the carrier and the box, if it’s currently assembled, check it with an alignment tool and see where it’s at..... it one of those things that should only have to be done during the initial assembly when it was new.

Awesome that sounds pretty easy. Thank you.

Those aren't original from Stellings. I drilled holes in the bottom of mine and installed plugs in them just in case water was to get in there. It woould be a real PITA to get it out of there. I dont know if I'd be comfortable with those caps on there without safety wore or something on them?